Most contain a ceramic honeycomb studded with microscopic particles of platinum, palladium or rhodium.Among other functions, these metals split oxygen molecules that land on their surface into more-reactive single oxygen atoms, which can combine with fuel at a much lower temperature than in a flame.This kind of rapid oxidation is different from other types where the process is very slow and is not accompanied by any flame or heat such as corrosion.Flames are actually gases that are burning and are at a very high temperature.Friction welding is the main process in this class and is widely used to join axisymmetric components in two different types of steels.Examples include engine valves where a heat resistant alloy head is required, but a steel that will slide well in the guide is needed for the stem. Fusion Welding Processes 2.1 Potential Problems Although the majority of welding is carried out on steels, other metals, particularly aluminium, are increasingly being joined by welding.These differences will be highlighted in this article.We all know what a fire is, or at least this is what we think.
These words are often confusing for many as they find fabrics in market that claim to be flame resistant and fire retardant.
There are many who think of fire and flame to be one and the same thing, which is incorrect.
If there are similarities, there are enough differences between fire and flame also.
Welding processes can be split into two broad categories: The surfaces of two components to be joined are cleaned, placed close together and heated while being protected from oxidation.
A pool of molten metal forms and connects the components, a filler rod may be used to add metal to the joint.